Magnetogram Chromosphere Observed from Wilcox Observatory
A solar magnetogram is a pictorial representation of the spatial variations in strength of the solar magnetic field. Magnetograms are often produced by exploiting the Zeeman effect (or, in some cases, the Hanle effect), which George Ellery Hale employed in the first demonstration that sunspots were magnetic in origin, in 1908. Solar magnetograms are produced by suitably instrumented telescopes referred to as magnetographs. Some magnetographs can only measure the component of the magnetic field along the line of sight from the observer to the source (the field's "longitudinal" component). One example of such a "line-of-sight" or "longitudinal" magnetograph is the Michelson Doppler Imager (MDI), a scientific instrument that takes magnetograms of the Sun in order to measure velocity and magnetic fields in the Sun's photosphere to learn about the convection zone and about the magnetic fields which control the structure of the solar corona. A vector magnetograph also measures the component of the magnetic field perpendicular to the line of sight (the field's "transverse" component), from which all three components of the magnetic field vector can be deduced. Two examples include the National Solar Observatory's SOLIS instrument and the Helioseismic and Magnetic Imager aboard NASA's Solar Dynamics Observatory satellite.
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Chromosphere_Magnetogram_Wilcox Directory
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Global Change Master Directory (GCMD) Keywords
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| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{
"fn": "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
"@type": "vcard:Contact",
"hasEmail": "mailto:solar.ngdc@noaa.gov"
}
|
| describedByType | application/octet-steam |
| description | A solar magnetogram is a pictorial representation of the spatial variations in strength of the solar magnetic field. Magnetograms are often produced by exploiting the Zeeman effect (or, in some cases, the Hanle effect), which George Ellery Hale employed in the first demonstration that sunspots were magnetic in origin, in 1908. Solar magnetograms are produced by suitably instrumented telescopes referred to as magnetographs. Some magnetographs can only measure the component of the magnetic field along the line of sight from the observer to the source (the field's "longitudinal" component). One example of such a "line-of-sight" or "longitudinal" magnetograph is the Michelson Doppler Imager (MDI), a scientific instrument that takes magnetograms of the Sun in order to measure velocity and magnetic fields in the Sun's photosphere to learn about the convection zone and about the magnetic fields which control the structure of the solar corona. A vector magnetograph also measures the component of the magnetic field perpendicular to the line of sight (the field's "transverse" component), from which all three components of the magnetic field vector can be deduced. Two examples include the National Solar Observatory's SOLIS instrument and the Helioseismic and Magnetic Imager aboard NASA's Solar Dynamics Observatory satellite. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Chromosphere_Magnetogram_Wilcox Directory",
"accessURL": "https://www.ngdc.noaa.gov/stp/space-weather/solar-data/solar-imagery/chromosphere/magnetograms/wilcox/",
"mediaType": "text/html",
"description": "All images and related documentation.",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "Global Change Master Directory (GCMD) Keywords",
"accessURL": "https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords",
"mediaType": "text/html",
"description": "The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.",
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|
| identifier | https://data.noaa.gov/waf/NOAA/NESDIS/NGDC/STP/Solar_Imagery/iso/xml/Chromosphere_Magnetogram_Wilcox_stp.xml |
| issued | 1999-01-01T00:00:00.000+00:00 |
| keyword |
[
"Sun-Earth Interactions > Solar Activity > Solar Active Regions",
"Sun-Earth Interactions > Solar Activity > Solar Imagery",
"Sun-Earth Interactions > Solar Activity > Sunspots",
"Sun-Earth Interactions > Solar Activity > Corona",
"Sun-Earth Interactions > Solar Activity > Solar Synoptic Maps",
"Space > Solar Region > Chromosphere",
"Solar Telescopes",
"Solar Observatory Stations",
"DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
"DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce",
"NOAA > Space Weather Program",
"WDS > World Data Service for Geophysics, Boulder"
]
|
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 1999-01-01T00:00:00.000+00:00 |
| publisher |
{
"name": "DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS,
NOAA, U.S. Department of Commerce",
"@type": "org:Organization"
}
|
| rights | otherRestrictions |
| temporal | 1999-01-01T00:00:00+00:00/2010-12-30T00:00:00+00:00 |
| title | Magnetogram Chromosphere Observed from Wilcox Observatory |
